Railcar Leasing and Management Services Group (Details 4) (Railcar Leasing and Management Services Group, USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Future contractual minimum rental revenues on leases
2014	$ 425.2
2015	359.8
2016	297.0
2017	232.6
2018	161.4
Thereafter	274.2
Total	1,750.2
Operating leases other than leases with the Trusts
Future contractual minimum lease obligations on leases
2014	12.8
2015	12.8
2016	12.7
2017	12.1
2018	12.0
Thereafter	38.2
Total	100.6
Future contractual minimum rental revenues on leases
2014	18.8
2015	13.8
2016	12.7
2017	9.5
2018	5.7
Thereafter	8.8
Total	$ 69.3